72143723015 has 48 divisors (see below), whose sum is σ = 107205944256. Its totient is φ = 45634867200.

The previous prime is 72143722999. The next prime is 72143723017. The reversal of 72143723015 is 51032734127.

It is a happy number.

It is not a de Polignac number, because 72143723015 - 2⁴ = 72143722999 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72143723017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12306185 + ... + 12312045.

It is an arithmetic number, because the mean of its divisors is an integer number (2233457172).

Almost surely, 2^72143723015 is an apocalyptic number.

72143723015 is a deficient number, since it is larger than the sum of its proper divisors (35062221241).

72143723015 is a wasteful number, since it uses less digits than its factorization.

72143723015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7980 (or 7967 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 35.

The spelling of 72143723015 in words is "seventy-two billion, one hundred forty-three million, seven hundred twenty-three thousand, fifteen".